Gemini 2.5 Flash Lite Preview 06-17 vs Gemini 2.5 Flash Preview 05-20 (thinking)

Compare Gemini 2.5 Flash Lite Preview 06-17 and Gemini 2.5 Flash Preview 05-20 (thinking), both from Google AI, context windows of 1.0M vs 1.0M, tested across 9 shared challenges. Updated February 2026.